Connecting new stopcock to steel pipe

[Rzzrmeanr]

I've got to replace my leaking stopcock, it seems to be connected to old steel pipe about 25mm, I guess 3/4 inch.

What is the correct way to connect to this pipe?The steel pipe comes up vertically then an elbow connector directly onto the old stopcock, however new stopcocks are compression fittings so it won't directly connect. Should I use a brass 3/4 inch male thread adapter ?

 

[ShaunCorbs]

What’s the od in inches 1/2 will measure 3/4, 3/4 will measure 1 inch od

Do you have space above ?

 

[Rzzrmeanr]

What’s the od in inches 1/2 will measure 3/4, 3/4 will measure 1 inch od

Do you have space above ?

The outside diameter of the steel pipe is 25mm.

 

[ShaunCorbs]

So inch so yes 3/4 to 22mm required

 

[Rzzrmeanr]

So inch so yes 3/4 to 22mm required

So will the elbow be brass or steel? I heard that you shouldnt connect brass fittings to steel due to corrosion differential.

 

[oz-plumber]

I hope not!
I've been doing that for 30 odd years.

 

[ShaunCorbs]

Steel but if you want to connect to the elbow you will require a 3/4 -22mm male iron

 

[Rzzrmeanr]

Steel but if you want to connect to the elbow you will require a 3/4 -22mm male iron

Could you send a link? Why iron out of curiosity? The stopcock nut is brass surely?

 

[Ben-gee]

It’s called a male iron but confusingly will be made of brass!

 

[ShaunCorbs]

https://www.NoLinkingToThis/p/flomasta-compression-adapting-male-coupler-22mm-x/63073

 

[Ric2013]

You can still get threaded stopcocks if you don't want to have to convert via compression. BES stocks them, to name just one supplier who will sell to public.